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Voorbeeld:
Benodigde continuvermogen = 3000 l/h
Aanvoertemperatuur van het ver-
warmingswater
= 80 °C
Retourtemperatuur van het ver-
warmingswater
= 60 °C
Temperatuurverschil van het ver-
warmingswater
= 80 °C – 60 °C = 20 K
Koudwaterinlaattemperatuur = 10 °C
Warmwateruitlaattemperatuur = 45 °C
Op grond van de bouwkundige omstandigheden moet een staande
warmwaterboiler worden gebruikt.
Omrekening van het continuvermogen naar l/h in kW
²
erf.
bzw. Φ
erf.
= µ
WW
· c · ΔT
WW
1
860
= 122 kW
= 3000 · · (45 – 10)
Bepaling van het continuvermogen van de verschillende boiler-
formaten
Omdat de bepaling voor alle boilerformaten op dezelfde wijze
gebeurt, wordt als voorbeeld de bepaling van het continuvermogen
voor de warmwaterboiler Vitocell 300-V met 300 l inhoud getoond
(zie gegevensblad, ”Vitocell 300-V”.
Van punt
1
(20 K) via punt 2 (gewenste tapwateropwarming: van
10 °C naar 45 °C bij verwarmingswateraanvoertemperatuur 80 °C) in
het punt
3
aflezen: Continuvermogen van de warmwaterboiler
54 kW
Tapwateropwarming van 10 naar ...°C
70
Verwarmingswateraanvoertemperatuur ...°C
5,0 m³/h
280 mbar
80
50
60
90
110 mbar
3,0 m³/h
15 mbar
1,0 m³/h
500 5 40 453025201510 35
Verwarmingswaterdebiet... m³/h
Verwarmingswaterdrukverlies ... mbar
Verwarmingswatertemperatuurverschil (ΔT) in K
40
45
0
5
10
15
20
25
30
35
50
55
60
65
70
75
0
80
85
90
95
100
continuvermogen in kW
45
45
45
45
45
60
60
60
Bepaling van het benodigd aantal warmwaterboilers van een
bepaald formaat
n = benodigd aantal warmwaterboilers
²
beno.
resp.
Φ
beno.
= benodigd continuvermogen in kW
²
boiler
resp.
Φ
boiler
= continuvermogen van de gekozen warmwater-
boilers in kW
Q
ben.
²
Sp.
n = =
Φ
ben.
Φ
Sp.
122 kW
54 kW
=
= 2,26
Benodigd aantal warmwaterboilers = 2
Dimensionering
(vervolg)
24
VIESMANN
Tapwateropwarming
4
5418 440 B/fl
24


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